void Update()
{
List <Trigger2DHelper> freeSensors = sensors.FindAll(s => s.IsColliding == false);
int freeCount = freeSensors.Count;
if (freeCount > spawnThreshold)
{
GameObject randomPrefab = prefabPicker.PickRandom();
GameObject go = SpawnBlocOn(randomPrefab, freeSensors[Random.Range(0, freeCount)].transform.position);
itemSpawner.SpawnAroundBloc(go.GetComponent <PolygonCollider2D>());
}
}
